Phonograph, talking machine, and the like



Agar-ii 1 3 926. 1530,56]

F. B. MSTCHELL PHONOGRAPH, TALKING MACHINE, AND THE LIKE Filed March 25,1918 I5 Sheets-Sheet '1 April 13, 1926. 1,580,561

F. B. MITCHELL -PHONOGRAPH, TALKING MACHINE, AND THE LIKE Filed March25. 1918 5 Sheets-Sheet 2 mus 0 M WITNEJS April 13 1926'. 1,580,561

' F. B. MITCHELL PHONOGRAPH, ,TALKING mourns, m was LIKE Filed March 25.1918 5 Sheets-Sheet 5 Patented Apr. 13, 1926.

UNITED STATES PATENT oFHcE .)v

FRANK B. MITCHELL, OF HOVE, ENGLAND, ASSIGNOR TO THE VICTOR TALKINGMACHINE COMPANY, OF CAMDEN, NEW JERSEY.

PHONOGRAPH, TALKING MACHINE, AND THE LIKE.

Application filed March 25, 1918. Serial No. 224,682.

To all whom it may concern:

Be it known that I, FRANK BOWLEY MITCHELL, a subject of the King ofEngland, residing in Hove, Sussex, in England, have invented certain newand useful Improvements in Phonographs, Talking Machines, and the-like,of which the following is a specification.

The invention comprises an automatic repeating and stopping mechanismset into operation by means of. a projection or shoulder on a recorddisc, and by the arrangement or adjustment of which a record may beplayed or-reproduced once and then automatically stopped; played twiceand then automatically stopped, or the mechanism ma be adjusted torepeat continuously, as esired.

The invention further consists in providing a construction which isadapted to be attached to any well-known type of talking machine, andwhich by its cooperation with the record will automatically cause therepetition of a reproduction of sound from a r record,'or stop therotation of the turntable on the completion ofsuch reproduction.

My invention further comprises certain improvements in providing atalking machine with a friction member actuated by a shoulder(projection or depression) on the record surface, to lift the point ofthe stylus above the surface of the record at the termination of thereproduction of sound therefrom, and to maint-ain'it in such elevatedposition during thefmovement of the reproducer from a position at. theend of the rec- 0rd groove to a positionat the beginning of the saidgroove.

The friction member may sometimes be mounted to move on flexible mediasuch as a spring, like the pendulum of a clock instead'of being pivoted.

A part governing or actuating the movement of the friction member isarranged to be moved by coming into contactwith v a shoulder on themoving record disc. The shoulder may be a slight projection up from thesurface of the record. It may be a thin piece of metal struck thereon,or it may be the edge of a recess in the record.

I will now describe the invention with reference to the accompanyingdrawings in which Figs. 1 and 8 are views in elevation of one form'of myinvention;

Fig, 2 is a plan View of the same;

Figs. 3 and 4 are elevational views of another form of the device;

Fig. 5 illustrates in perspective a further modification of theinvention;

Fig. 6 is a perspective view of an automatic stop for varying theoutward move ment of the tone arm and reproducer carried thereby;

Fig. 7 is another form of an automatic stop for positioning the tone armin its outward movement;

Flgs. 7 a and 7 are detail views in perspective of two of the parts ofthe adjust-able stop shown in Fig. 7.

Figs. 7 and 7 'are s de elevational and plan views, respectively, ofathird part of the stop mechanism shown in Fig. 7.

Figs. 9 and 12' are views partly in section of the mechanism shown on alarger scale in Fig. 6.

Fig, 10 is a plan view of the talking machine provided with my repeatingand stopping mechanism;

Figs. 11, 13 and 14 show in side eleva tion a further embodiment of 'my-inven tion, the construction being that shown attached to a talkingmachine in Fig. 10;

Figs. 15 and 16 show alternate methodsof providing a disc record withshoulders to actuate the repeating and stopping mechanlsm.

Fig. 17 is a showing of a further modification of my invention similarin some respects to that'shown in Fig. 5. 1

The'Figures 1, 2, and'8, show an apparatus intended for use on machinesWithout a movable stop member to limit the lateral movement of the tonearm. The friction (see dotted lines in Fig. 2). The action is asfollows: 1 I

When the arm C is down, as shown by the dotted lines, resting on therecord and. holding the friction member C in the inac 2) attached to theblock E in which the member'D' is adapted to slide tive position whilethe record is being played (as shown in Fig, 11 of another type) thespring F will also be down and impinge against the right hand side ofthe small spring E mounted on the guide E. This will prevent the springG, having its opposite ends respectively attached to the members B andD, from pulling the member D to the forward position shown in Fig. 8that is to say, towards the stylus.

When the record is finished, the pawl G which is loosely pivoted at C tothe end of the arm 0 and which with said arm C constitutes a feeleroractuating member, engages the shoulder Y on the record VJ (see Fig. 10)and swings the member C on its pivot C throwing the arm C up, as shownin Fig. 1, thus bringing the friction member G down on the record, withthe result that the friction member is drawn in the direction in whichthe record is rotating, and towardthe stylus and under the sound box,raising and holding the tone arm just enough to cause the stylus to beclear of the record, as shown in Fig. 14-, wherein is illustratedanother embodiment of my invention.

The rising of the plate 0 lifts the spring F clear of the top of springE as shown in Fig. 1. This small spring E now springs forward underspring F so that if spring is lowered it will go on top of spring E andthe tendency of the member G will not be stopped by the spring E Thespring G would now pull the parts D and G to the left, as shown in Fig.8, but while the friction member C is engaging the record and causing alateral movement of the tone arm toward the periphery of the record, thestop pin H will prevent the spring G from so acting until the frictionmember gets over the edge of the disc and arm C again falls free of thestop H N ow the spring G will draw the member D and its parts to theleft toward the stylus, as shown in Fig. 8, but with the governing arm Cdown.

Immediately upon the friction member C getting over the edge of thedisc. and the pawl C falling on the surface, the stylus will enter theoutermost groove of the still moving record and play again. The dottedcircular line in Fig. 2 represents the edge of the record.

hen this second reproduction of sound from the record is completed, thepawl C is again engaged by the shoulder Y, the friction member againlifts the stylus, and the tone arm is again lightly carried outwardlytowards the edge of the record but this time not farenough for thefriction member to get over the edge of the disc owing to the fact thatthe friction member is now nearer to the stylus and further from theaxis of the tone arm A (see Fig. 8). The disc is therefore brought to astandstill by the fr ction of the friction member, 0*. Fig. 2 shows ascrew E to fix the slide in either of its positions when desired forconstant repetition or breaking.

To reset the apparatus for repetition it is only necessary to pull outthe sliding member 1) until the spring F catches behind the spring EThis holds it back until the working of the machine again releases it asbefore describec The block C (see Fig. 1) is constructed. with a slot togive a swing grip on the adjustment screw of the friction member C sothat wherever it is adjusted for height (to suit a different lengthneedle) it will remain at that adjustment without the use of a locknutto fix it. The friction member in some forms has a hard metal brakingsurface, as a soft surface sometimes hinders the lateral movement of theton-e arm.

Referring to Fig. 5 a. block B is screw threaded to revolve freely onthe screw threaded vertical pin of the clamp B, (here shown in positionfor mounting on the tone arm) and carries a tubular bearing B in whichrotates the axle C carrying a friction member C on one end and a crank Con the other end.

The bearing may be movable around the pin of clamp 13 through a smallarc to perm t the friction member to be adjusted toward or away from thestylus in order to cause the device tooperate as a stop oras a repeater.

The nuts B and B are to be locked together in any suitable position ofadjustment. The nut 13* carries a pivot pin 13 for the arm C to work on.

vVhen the arm C is thrown up by the pawl catching against the shoulderon the recorc disc (see Y Fig. 4) it will push the crank C down,rotating the friction member C until it is stopped with the part markedX, in contact with the record, and acting as a brake shoe after havingraised the tone arm and stylus. The helical formation of the frictionmember G shown in Fig. 5 is so that the moving disc may help to pull itround into position with the part X in contact with the disc. Anysuitable means may he provided for limiting the horizontal arc movementof C and to hold it in position either towards or away from the stylusfor the purpose stated. The apparatus shcwn in Fig. 5 may be used toautomatically lift the. stylus and tone arm without the rotary member Csee Fig. 17 by extending the arm B to form a solidly mounted fric tionmember therewith, such as C shown in Fig. 1, for example, to operate onthe record as follows: In this case the pin C wou d also be a fixed partof block B (see Fig. 17). The block is screw threaded and freely movablearound the pin 13 as before, and then when the arm C is thrown up (ifits end at O butts againstthe near side of pin C it will throw the blockB and the friction member around the pin through a small arc towards thestylus, and at the same time the block will descend on the screw towardsthe surface of the record until stopped by the nut 13*.

If the screw threads onthe pin B are made with a strongly inclined helixthis lowering of the friction member may be arranged to raise the stylusand tone arm. The friction grip of the moving record will also help.

A spring may be provided to return the friction member to the inactiveposition when free of the record.

Figs. 3 and 4 show an apparatus in which the two positions are obtainedby a link motion instead of by a sliding motion. The action is asfollows The spring 13, fixed to the arm B of the clamping member B,holds the arm C in position in the rear of the stylus, as shown in Fig.3. The spring B tends to. pull it into the position shown in Fig. 4. 25'

During action, when the pawl C catches against the shoulder Y the arm isthrowir up and the friction member C lifts the tone arm, as shown inFig. 14:. This causes the small extension C to push spring 13 up out ofabutting action against the pivoted portion of the arm C. The member 0is then pulled to the right hand a very small. amount by spring B butenough to prevent the spring B again falling to the catching position.The small extension C will prevent right by catching the block B on theunder side of spring 13. Thus while the tone arm is being traversedoutwards, the friction member will still be in position farthest fromthe stylus and will carry the arm far enough for it to get over the edgeof the record and the stylus to again get in action in the grooves atthe outer edge of the record. The end C will now fall on to the surfaceof the record releasing the extension C from the small block B Thespring-:B may now pull the'linlr B s and the friction member to theposition nearest the stylus as shown in Fig. 4.

When the record has been played the second time the lifing of the stylusagain takes place but as the frictionmember is now near the stylus andmore remote from the axis of the tone arm, the tone arm will not have somuch outward traverse and the machine will be stopped by its friction asbefore stated.

In order that the governing arm C may be more forcibly thrown to get thefriction member into action on the record disc, the end of the governingarm is provided with a. pawl C pivoted at its end (1*, (see Fig. 13.)The action may be seen from Fig. 4; where the shoulder Y is representedmoving in the further movement to the direction of thearrown Thisshoulder on C down on the disc and raise the stylus as 7 described.

My device-is adopted tobe mounted on a machine in which the tone arm Ais mounted on pivots A (see Fig. 12) which are able to move in acircular guideway inside the bearing A*. When the tone arm is lifted italso moves on the said pivots.

The friction member is mounted to swing freely in a bearing mountedcrosswise on the top of an adjustably screw threaded pin B, as shown inFig. 13, for which purpose the top of the friction member is providedwith a cylindrical journal C fitting into a horizontal bearing. 22provided on, the top of the pin B.

B is a block clamped between the ends of a band B, adapted to be clampedby the nuts shown around the neck of the reproducer so that the frictionmember shall be mounted, as shown in Fig. 14. It has stops not shown toprevent it swinging too far in either direction and it is so balancedthat the pawl end hangs lowest as shown in Fig.

11 at A Figure 13 is a full sized view ofbearing A carries the stopmember, shown in Fig. 6.

The fixed part .1 of the stop apparatus is rigidly attached thereto. Astout pin A is fixed in the base part A of the arm A. On the fixed partP, a plate-R is pivoted by the pivot P so that it may have'a very freeswinging movement and is so balanced that its normal position is thatwhich is shown. in Fig. 9, wherein its lower end normally lies in thepath of the pin A A similar swinging plate S is pivoted to the fixedpart P on a pivot P and is so balanced that it normally hangs in theposition shown in Fig. 6 wherein its lower end holds the plate R aboveits normal position and out of the path of the pin A The plate S ismounted in such a position with respect to the fixed hearing A that itwill limit the lateral movement of the pin A and the tone arm-(see Fig.12) in such a manner that the stylus shall remain on the surface of therecord while the friction member C moves over-and off the edge of therecord. For this purpose the friction member C is offset laterallytoward the edge of the record, as shown in Fig. 10. When,

however, the plate S has been swung on its wardly to its normal position(as shown in Fig. 9) until the plate S has been moved from in front ofit by the pin A The action is as follows The machine is started with theswing arm or friction member C in the position shown in Fig. 11. VI henthe record is finished the stop Y will catch the pawl C and throw thearm up raising the needle, as shown in Fig. 14-.

Owing to the relative positions of the centre of the record, the axis ofthe tone arm movement and the position of the friction member the arm isnow carried outwards by the friction member until stopped by the memberS (if it has been for repetition, as shown in F 6). Then, as stated thefriction member C will fall over the edge of the record and immediatelygravity will cause the arm C to swing into the inactive position. Thepawl C still being over the record will now rest thereon, as shown inFig. 11 and the stylus entering the grooves of the still moving record.the record will again be played.

the stopping of the tone arm takes place the pin A will drive the memberS back from the position shown in Fig. (5 to the stop pin P allowing themember it to fall in front of it (see Fig. 12) so that when the pin A isautomatically removed the plate R will complete its fall and assume theposition shown in Fig. 9. The next time the stop acts pin A will bestopped by the member R which is operative to limit the outward movementof the tone arm and so prevents the friction member from getting overthe edge of the record. Then the machine will be brought to a s.andstill by the friction of the friction member upon the surface of therotating record.

In this construction the pin A will be withdrawn (for the free handlingof the tone arm when setting the machine) by simply raising the tonearm, owing to the relation of the pin A to the pivot pins A. of the armA. If it should be lowered with the pin A butting on the face of theplate S; that plate is mounted so loosely longitudinally of its pivotthat it will yield or give away in front of it sliding longitudinally onits pivot to a position against the plate P until the working of themachine and the consequent lateral movement of the tone arm has removedthe pin A. as shown in Figs. 9 and 12, when the plate S (see Fig. 6)will again be moved towards the arm base A", if pressed by the plate It.Otherwise the plate will normally stay back on plate I.

R is a screw by turning which the plate B may be fixed so as to giveconstant repetition when desired (see Fig. 6). By this form of stoparrangement the machine will repeat once only when the plate R has beenlifted and the plate S has fallen in front of it (see Fig. 6) thenitreturns to the braking position automatically on its next round asdescribed. The pin E (Fig. 6 and 9) is a stop to limit the fall of theplate B.

Fig. '7 illustrates a further modification of the construction memberillustrated in Figs. 6 and 9 and in Figs. 7, 7 7, T is illustrateddetails of the important parts thereof. In this form of the device theoutward movement of the tone arm is limited by the pin A? which on itsfirst outward swing in the normal operation of the device engages theshoulder T of the adjustable band T. This band T may be adjusted to andhold in any position on the nxed tube or bearing A by the set screw T When the pin A? moves to this position against the shoulder T the outwardmovement of the tone arm is stopped and the friction member C will havep ssed over and dropped off the edge of the reord as above described,and the pawl C and the stylus will both be on the surface of the record..ln coming to his position, however, the piif will have first engagedthe shoulder U and will have turned it on its pivot T so that it nolonger supports the latch or pivoted member V out of the path of the pinA When, therefore. the tone arm next moves inwardly to reproduce soundfrom the record the second. time. the pin A moves from under the latchor pivoted mem ber V whereupon the said pivoted member V falls downwa'dly on its pivot V with the forward end V in the path of the pin A andlittle in advance of the shoulder T on the band T. The next time the armis moved outwardly toward the periphery or edge of the record the stoppin A will engage the forward end of the latch or pivoted member Vlimiting the outward movement of the tone arm and preventing thefriction member C from falling over the edge of the record, whereuponthe friction member will now act as a brake to stop,

the continued rotation of the record.

The pivoted member ll is provided with an adjusting screw U threadedtherethrough and having its inner end adapted to bear against the outersurface of the band T so that it will not turn on its pivot whenadjusted to the position shown in Fig. 7 until it is engaged by the pinA on the tone arm. The friction between the end of the screw U anybe'adjusted by turning said screw bacliwardly or forwardly as desired toproduce the amount of friction which ma be required to hold the pivotedmember U in such a manne that it will hold the latch V out of the pathof the pin i and also so that when it is engaged by the said pin 3 itwill readily turn to perniit the latch V to fall upon the withdrawal f Ifrom under the free end V f the latch V.

The screw V is provided for the purpose of holding the latch or pivotedmember V in its upward position and when it is desired to have themachine continuously repeat the selection on the .record, and to holdthe member V in its lower position when it is desired to have/the deviceoperate as a stop for a single reproduction of sound from the record. I

Either of these forms of friction member may be'used without therepetition apparatus as an automatic brake merely;

In the foregoing description of my invention, it'has' been made plainthatI have provided an attachment adapted to be connected to andoperative with well-known types of disc talking machines, the attachmentcomprising briefly a member depending from a pivot substantially unitarywith the sound box, said member having two portions or arms, one adaptedto catch on a suitable projection provided on the surface of the recordand by its engage-ment therewith to spring said member on its pivot tobring the other portion or record-engaging part there of, normally heldout of contact with the surface of the record, into gripping and liftingengagement with the surface of the record to elevate the sound lbOX andstylus carried thereby to a position above the .surface of the record.The point of engagement with the record of said record engaging portionof the member is such that the friction between said member and the surface of the record 18 effectivelto swing the arm and sound box over therecord in the reverse direction to that which they had during thereproduction of sound from the record.

In connection with the 'aboveI have also provided and disclosed severalmeans whereby the extent of the outward movement of.

the tone arm over the record may be varied so as to effect a repetitionof the reproduction or a stopping of the rotation of the record,depending uponthe limit set to the out-ward swing of the sound box ortone arm. The mechanisms by which these operations are carried out maybe varied but they all fall within the scope and aim of my invention solong as they are defined in the appended claims.

Having thus described my invention what- I claim and desire to protectby Letters Patent of the United States is: 7

1. In a talking machine having a tone arm, adapted to swing inwardlyduring the reproduction of sound from a record on said machine, a soundbox carried by said tone :arm, a stylus, and means to rotate a record,

the combination of a record presenting a shoulder beyond the inner endof the sound record groove and extending transversely to said groove, amember carried by said sound box and lightly resting on the surface ofsaid record during'the reproduction of sound therefrom at a point nearerthe center of said record than is the stylus, and friction means drawnby said member, upon its engagement with said shoulder, into engagementwith said record whereby said friction means lifts said stylus out ofengagement with said record and the friction between said friction meansand the surface of said record swings said sound box outwardly over thesurface of the record to bring said stylus to a position adjacent theperiphery of said record.

2. In a talking machine having a tone arm, a sound box carried thereby,a. stylus and means to rotate a record, the combination of a frictionmember mounted on a pivot substantially unitary with such'sound box anddependent therefrom, and a'shoulder on said record adapted to swing-saidmember to bring sa id friction member beneath said sound box and to liftthe stylus from the record, whereby the friction between said frictionmember and the surface of said record swings said sound box and tonearm'outwardly toward the periphery of said record, and means to limitthe outward movement of said tone arm, whereby the continued frictionbetween said friction member and the surface of the record near theperiphery of the record stops the rotawith said record, and drawn bysaid feeler.

into engagement'with said recordvwhensaid feeler engages said shouldertolift the stylus above the surface of the record and maintain the sameelevated, the friction between said record engaging means and saidrecord being operative to swing said sound box and tone arm transverselyover the record.

4. The combination with -a sound record provided with a sound recordgroove and with a portion presenting a transverse shoulder beyond theend of said groove, and means to rotate said record, of a pivoted tonearm, a sound box mounted on said arm,

a stylus carried by said sound box, a member ronnected to said sound boxand floating on the surface of said record during the'reproduction ofsound therefrom nearer. the center of the record than is said stylus,and record engaging means mounted on said sound box normally out ofengagement with said record and drawn by said member into engagementwith said record when said member engages said shoulder, whereby thefriction between said record engaging means and said record lifts saidstylus and swings said sound box outwardly to a position adjacent thebeginning of said groove and moves said record engaging means over theedge of said record to again bring said stylus into reproducing relationwith said sound record groove.

5. The combination with a sound record provided with a sound recordgroove and with a portion representing a transverse shoulder beyond theend of said groove, and means to rotate said record, of a pivoted tonearm, a sound box mounted on said arm, a stylus carried by said soundbox, a member connected to said soundbox and floating on the surface ofsaid record during the reproduction of sound therefrom nearer the centerof the record than is said stylus, record engaging means mounted on saidsound box normally out of engagement with said record and drawn by saidmember into engagement with said record when said member engages saidshoulder, whereby the friction between said record engaging means andsaid record lifts said stylus and moves said sound box outwardly to aposition adjacent the beginning of said groove and moves said recordengaging means over the edge of said record to again bring said stylusinto reproducing relation with said sound record groove, and means toprevent said record engaging means from falling over the .edge of therecord at the end of the second outward movement of said tone arm andsound box.

6. The combination with a sound record provided with a sound recordgroove and with a portion presenting a transverse shoulder beyond theend of said groove, and means to rotate said record, of a pivoted tonearm, a sound box mounted on said arm, a stylus carried by said soundbox, a member connected to said sound box and floating on the surface ofsaid record during the reproduction of sound therefrom nearer the centerof the record than is said stylus, record engaging means mounted on saidsound box normally out of engagement with said record and drawn by saidmember into engagement with said record when said member engages saidshoulder, whereby the friction between said record engaging member andsaid record lifts said stylus and swings said sound box outwardly to aposition adjacent the beginning of said groove and moves said recordengaging member over the edge of said record to again bring said stylusinto reproducing relation with said sound record groove, to reset saidfloating member and record engaging member and to repeat thereproduction of sound from said record and means cooperating with saidrecord engaging member to stop the rotation of said record after thesecond reproduction of sound therefrom.

7 An attachment for talking machines comprising a rigid member, means topivotally support said member at one end so that it depends over arecord on said talking machine, the depending end of said member beingprovided with two arms, the first of said arms being provided with arecord engaging end, and the second of said arms normally extendingbelow the level of the first of said arms and provided with a sharp edgeadapted to float on a record and engage a shoulder on said record.

8. An attachment for talking machines comprising a rigid member, meansto pivotally support said member at one end, the other end of saidmember being provided with two arms, the first of said arms beingprovided with a frictional record engaging end and the second of saidarms being provided with a sharp edge adapted to float on the surface ofa record and normally extending below the level of said first mentionedarm, said sharp edge extending generally toward said record engagingend.

9. The combination with a sound box, a stylus and a tone arm upon whichsaid sound box is mounted, of a sound record tablet having a soundrecord groove therein and a transverse shoulder beyond and near the endof said sound record groove, means to support said record for rotation,a feeler car ried by said sound box and resting lightly on said recordin advance of said stylus in its travel across said record inreproducing sound therefrom, and means actuated by said feeler when thesame engages said shoulder to lift the rocord engaging end of saidstylus out of said sound record groove and above the surface of saidrecord and to stop the rotation of said record.

10. In a talking machine having a sound box, a stylus, a swinging arm onwhich said sound box is carried, said sound box and arm being carriedacross the record during the reproduction of sound by the engagement ofsaid stylus with said record, the combination of a member pivoted tosaid sound box having a portion normally floating on the surface of saidrecord. in advance of said stylus, and a friction portion normally outof contact with said record, and a shoulder on said record with whichsaid floating portion engages when the stylus is at the end of saidgroove and operative to swing said friction portion into engagement withthe surface of said record to lift said stylus and by the cooperation ofsaid friction portion with said record to swing said sound box and armin the reverse direction across or over said record.

11. In a talking machine having a tone arm, a sound box mounted thereon,a stylus, a record provided with a sound record groove and a shouldertransverse to said groove, and means to rotate sald record,

12. In a talking machine comprising a, tone arm, asound box and stylus,a record presenting a transverse shoulder at the inner end of the recordgroove thereof and means to rotatethe record, the combination ofafriction member connected with a sound box and normally out of contactwith said record, means-connected to, said friction member and engagedto said shoulder at the end of the reproduction of sound from saidrecord to bring said friction member into engagement with said record tolift the sound box and, by reason of the friction between said frictionmember and said record, to swing said sound box outwardly and saidfriction member off the periphery of said record and to bring saidstylus into the outer end of the record groove, whereupon thereproduction of sound from said record is repeated, and means set bysaid friction meniber 'at the end of its said first outward swing tolimit and stop the second outward movement of said sound box andfriction member before the latter reaches the periphery of the record.

13. In atalking machine having a tone,

arm adapted to swing over the record during the reproduction of soundtherefrom, a sound box carried by said tone arm, a stylus and means torotate a record, the combination of a record presenting a shoulderbeyond the end of the sound record groove and extending transversely tosaid groove, a member carried by said sound box at a point nearer theend of the record groove than is said stylus and substantially on thesurface of said record, and friction means drawn by said member upon itsengagement with said shoulder into engagement with said record wherebysaid stylus is lifted out of engagement with said record and thefriction between the friction means and the surface of said recordswings said sound box and arm transversely over the surface of saidrecord.

14. The combination with a sound record provided with asound recordgroove with a transverse shoulder beyond the inner end of said groove,and means to rotate said record, of a pivoted tone arm, a sound boxmounted on said arm, a stylus carried bysaid sound box, an actuatingmember con'-' nected to said; sound box to move therewith and extendingclose to the surface of said record during the reproduction of soundtherefrom at a point nearer the center of the record than is saidstylus, a, friction; member mounted on said sound box normally out ofengagement with said. record and adapted to be drawn by said member intoengagement with said record when said actuating member engages saidshoulder, whereby said stylus is lifted out of engage-- ment with saidrecord and the, friction-between said friction member andsaid'record.

swings said sound box outwardly to the beginning of said sound recordgroove,eand. moves said friction member over the edge of said record todrop said sound box, and to bring said stylus into said recordgroove, toreset said actuating member and, said friction member and to repeat thereproduction of sound from said record, and

means to prevent said friction member from moving over the edge of saidrecord upon the second outward movement of said, tone arm. l

15. An attachment for talking machines comprising a rigid member havingtwo de pending arms, means to pivotally support said member so that itdepends over a record on said talking machine, one of said arms beingprovided with a record-engaging end normally out of contact with thesurface of said record, and the, other of said arms normally extendingbelow the level of said first mentioned arm and adapted to' lie close tothe surface of the record and to engage a, shoulder on' said record. V

16. An attachment for talking machines comprising a rigid member, meansto pivotally support said member at one end, the other end of saidmember being provided with two arms, one of said arms being pro videdwith an end adapted to frictionally engage a talking machine record andthe other of said arms being provided with an end normally extendingbelow and generally toward the end of said first mentioned arm.

17. In a talking machine havinga record, means to rotate the record andsound reproducing means including a stylus, the

combination with a friction member carried by said reproducing means andnormally held out of engagement with the surface of said record andhaving a friction surface and said record carries said member under saidreproducing means and against said stop to lift said reproducing meansout of reproducing relation with respect to said record and to then holdsaid member stationary with respect to said sound reproducing means, andwhereby the continued frictional engagement of said member with saidrecord swings said sound reproducing means transversely over the record.

18. In a talking machine having a tone arm, a sound box carried thereby,a stylus and means to rotate a record, the combination of a recordpresenting ashoulder adjacent one end of the sound record groove in saidrecord and extending transverse to said groove, a member operativelyconnected to said sound box and lightly resting on the surface of saidrecord during the reproduction of sound therefrom, and friction meansdrawn by member upon its engagement with said shoulder into engagementwith said rec 0rd whereby said friction means lifts said stylus from itsengagement with said record, and the friction between said means and thesurface of said record swings said sound box and arm transversely overthe surface of sair record.

19. A stop-motion for motor-driven tall;- ing machines having therein avdetector mounted in predetermined relation to the reproducing needle andcomprising a part adapted to bear frictionally on the sound record, saiddetector being displaceable in respect to the record and its mounting bythe energy of relative motion of the record and detector whenever thedetector is enceun tcred by a part of the record of different characterfrom the sound record proper, in combination with means for stopping themotion as a consequence of the displacement of the detector.

20. A stop-motion detector for talking machines comprising frictiondevice adapted to feel the surface of the record, means adapting thedetector to be thrown out of contact With the record by encounter of thefriction-device with a surface abnormal to the sound-record surface, andmeans actuated on displacement of the detector for stopping the machine.

2-1. A stop-motion detector for talking machines comprising a partadapted normally to bear on the surface of the sound-record with apredetermined light pressure, and means whereby an impulse transmittedto said part by an abnormalsurface of the record may cause said part totake and retain another position out of contact with the record.

22. A talking-machine having therein a movable tone-arm, sound-box, anda record reproducing needle carried thereby, in combination with astop-motion detector adapted to feel the surface of the record and to bedisplaced by a part thereof within the sound record, a mounting thereforrigid on and uzorable with the tone-arm, and means for stopping themachine controlled by said letector.

A talking-machine having therein a movable tone-arm, sound box, and arecordi-"eproducing needle carried thereby, in combination with astop-motion detector movable about a pivot substantially tangential tothe circular arc swept by the tone arm adapted to feel the surface ofthe record ahead of; the needle, a mounting for the detector adjustablyfixed on the tone-arm, and means for stopping the machine controlled bysaid detector when displaced about said pivot.

In testimony whereof I have signed my name to this spec1licat1on.

F. B. MITCHELL.

